Since its introduction with Phase 4 of Season of Discovery, Tarnished Undermine Real has been a popular currency. Earned from Level 55+ dungeon bosses once per day, it has provided a good way to keep content relevant while offering a spot of bad luck protection.
Tarnished Undermine Real in Season of Discovery
Throughout Phase 4, this currency has been capped at.
However, on the Season of Discovery Phase 5 PTR, eagle-eyed players have noticed a new addition to the vendor, which costs — higher than the current cap.
As is always the case with the PTR, this might just be a placeholder item or a placeholder cost. However, it does sound likely that the cap will be increasing and some new items will be added.